SEO Black Hat: The prohibited use SEO techniques to promote your website on search engines, in order to achieve results faster and higher in the search results. Some common techniques of "black hat" is "spamming". Put the links and create links bluff, spreading. And high speed. The result is quite high, but the duration is not long in search results.
SEO White Hat: The application of SEO techniques that the search engines recommended. Follow the guidelines set by the search engines. To result in long, medium speed. Create a link moderate, and high relevance. In the search engine results remain relatively stable period.